Collection: Glock 21 Holsters for Concealed & Open Carry

What’s the best holster style for carrying a Glock 21?

The best holster style for a Glock 21 depends on your use case. For open carry, duty use, or range training, an OWB holster provides superior comfort and accessibility. For concealed carry, IWB and appendix holsters—especially hybrid models with padded backers—help distribute the weight of the full-size .45 ACP frame while reducing printing.

Can I conceal carry a Glock 21 comfortably?

Yes. Concealed carry with a Glock 21 is possible using a hybrid IWB holster like the Cloak Tuck 3.5 or ShapeShift Appendix Carry. These holsters offer adjustable cant, ride height, and passive retention, making it easier to conceal a full-size handgun when paired with the right clothing and belt.

Can I carry a Glock 21 with a weapon light or laser?

Yes. To carry a Glock 21 with a light, you must use a light-compatible holster molded for your specific setup. Models such as:

• Glock 21 with Streamlight TLR-7A
  
  
• Glock 21 MOS with Nightstick TCM-550XL
  
  

are supported in select OWB and modular holster lines. Always verify your light model when selecting a holster for proper fit and retention.

Is the Glock 21 compatible with red dots or suppressor-height sights?

Yes. Some Glock 21 holsters in the Cloak and ShapeShift lines are compatible with optics-ready Glock 21 MOS models and support taller suppressor-height sights. Look for holsters marked “optic compatible” to ensure clearance for your red dot or upgraded irons.

Are there Glock 21 holsters for left-handed users?

Yes. Alien Gear manufactures left-hand Glock 21 holsters across multiple platforms including IWB, OWB, appendix, paddle, and chest holsters. All models offer the same adjustable retention, modularity, and comfort as their right-hand counterparts.

Can I use a Glock 21 holster with other Glock models like the Glock 20 or Glock 41?

No. While the Glock 20, Glock 21, and Glock 41 share similar frame sizes, they differ in slide width, barrel length, and profile. Always use a holster molded specifically for the Glock 21 or its variants (e.g., Glock 21SF) for proper retention and safety.

What holster options are available for the Glock 21SF?

The Glock 21SF is supported in select holsters from the Cloak and ShapeShift series, including IWB, OWB, and chest holsters. These holsters are molded to accommodate the SF (Short Frame) design, ensuring retention and comfort for everyday or duty carry.

What’s the best holster for Glock 21 duty or tactical use?

While Rapid Force Level 2 and Level 3 duty holsters are not currently offered for the Glock 21, Alien Gear’s OWB holsters from the Cloak and ShapeShift lines provide rugged, range-ready performance with passive retention and adjustable belt mounts—ideal for open carry or range roles with the Glock 21.

Can I carry the Glock 21 in a chest or drop-leg holster?

Yes. Alien Gear offers chest holsters and drop leg platforms for the Glock 21 and Glock 21 MOS through the ShapeShift system. These configurations are ideal for hiking, tactical environments, or outdoor carry where waistband access is limited.

What materials are used in Glock 21 holsters from Alien Gear?

Alien Gear holsters for the Glock 21 use custom-molded polymer shells for retention, paired with neoprene or composite backers depending on the product line. These materials ensure sweat resistance, long-term durability, and comfort for all-day concealed or open carry.

Does Alien Gear offer modular holsters for the Glock 21?

Yes. The ShapeShift Modular Holster System supports the Glock 21 in multiple configurations including:

• Appendix carry (AIWB)
• IWB
• OWB paddle
• Chest holster
• Drop leg platform

All carry positions use a single Glock 21 shell, simplifying training and draw consistency.